Maridalsvannet
E665911
Maridalsvannet is the largest lake supplying drinking water to Oslo, Norway, and a popular nearby recreation area.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Maridalsvannet canonical | 4 |
| lake Maridalsvannet | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7448704 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Maridalsvannet Context triple: [Kjelsås, hasNearbyLake, Maridalsvannet]
-
A.
Nøklevann
Nøklevann is a freshwater lake in the Østmarka forest area of Oslo, Norway, popular for outdoor recreation such as swimming, hiking, and fishing.
-
B.
Sognsvann
Sognsvann is a popular recreational lake and surrounding forested area in northern Oslo, Norway, known for hiking, swimming, and outdoor activities.
-
C.
Sjusjøen
Sjusjøen is a popular Norwegian cross-country skiing destination and mountain village known for its extensive trail network and scenic highland landscapes near Lillehammer.
-
D.
Snåsavatnet
Snåsavatnet is one of Norway’s largest lakes, located in Trøndelag county and known for its scenic surroundings and rich freshwater ecosystem.
-
E.
Hallingdalselva
Hallingdalselva is a major river in eastern Norway known for flowing through the Hallingdal valley and supporting hydropower production, fishing, and outdoor recreation.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Maridalsvannet Target entity description: Maridalsvannet is the largest lake supplying drinking water to Oslo, Norway, and a popular nearby recreation area.
-
A.
Nøklevann
Nøklevann is a freshwater lake in the Østmarka forest area of Oslo, Norway, popular for outdoor recreation such as swimming, hiking, and fishing.
-
B.
Sognsvann
Sognsvann is a popular recreational lake and surrounding forested area in northern Oslo, Norway, known for hiking, swimming, and outdoor activities.
-
C.
Sjusjøen
Sjusjøen is a popular Norwegian cross-country skiing destination and mountain village known for its extensive trail network and scenic highland landscapes near Lillehammer.
-
D.
Snåsavatnet
Snåsavatnet is one of Norway’s largest lakes, located in Trøndelag county and known for its scenic surroundings and rich freshwater ecosystem.
-
E.
Hallingdalselva
Hallingdalselva is a major river in eastern Norway known for flowing through the Hallingdal valley and supporting hydropower production, fishing, and outdoor recreation.
- F. None of above. chosen
Statements (34)
| Predicate | Object |
|---|---|
| instanceOf |
drinking water reservoir
ⓘ
lake ⓘ |
| country | Norway ⓘ |
| hasActivity |
cross-country skiing
ⓘ
cycling ⓘ hiking ⓘ nature observation ⓘ |
| hasEcosystemType | freshwater lake ⓘ |
| hasEnvironmentalConcern | protection from pollution ⓘ |
| hasFunction | reservoir for municipal waterworks ⓘ |
| hasNameLanguage | Norwegian ⓘ |
| hasNameMeaning | the lake of Maridalen ⓘ |
| hasRegulation |
restrictions on motorized boats
ⓘ
restrictions on swimming ⓘ |
| hasShorelineRestriction | limited public access to protect water quality ⓘ |
| hasSurroundingLandscape |
forest
ⓘ
hills ⓘ |
| hasTypeOfArea | recreation area ⓘ |
| isLargest | main drinking water source for Oslo ⓘ |
| isPopularWith |
residents of Oslo
ⓘ
tourists ⓘ |
| locatedIn |
Maridalen
ⓘ
linked to:
Maridalen (partly)
Oslo ⓘ Oslo Municipality ⓘ Viken county ⓘ |
| near |
Oslo city centre
ⓘ
linked to:
Sentrum, Oslo
|
| outflow |
Akerselva
ⓘ
linked to:
Akerselva river
|
| partOf |
Akerselva river system
ⓘ
linked to:
Akerselva river
Oslo water supply system ⓘ |
| protectedFor | drinking water quality ⓘ |
| use |
drinking water supply
ⓘ
outdoor activities ⓘ recreation ⓘ |
| waterSupplyFor | Oslo ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Maridalsvannet Description of subject: Maridalsvannet is the largest lake supplying drinking water to Oslo, Norway, and a popular nearby recreation area.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Akerselva river
subject linked to:
Akerselva river
subject linked to:
Maridalen (partly)
subject linked to:
Maridalen (partly)
linked to: Maridalsvannet